MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN

SERVICE GROUP(S): MICRO,MINI,LARGE     MFG: MAI BASIC FOUR

 NACS  TYPE(S): N103                   MFG. MODEL(S): CPU

CATEGORY: PREVENTIVE MAINT.            DESC: PM GUIDELINES

                   *** TABLE OF CONTENTS AS OF 12/20/90 ***
FIB 00001.MPX GUIDELINES..............................................07/21/89
FIB 00002.SPX GUIDELINES..............................................07/21/89
FIB 00003.13XX. GUIDELINES............................................07/24/89


PREVENTIVE MAINT.-MAI BASIC FOUR-CPU----------------Table Of Contents Pg01 of 01
FIB 00001                                                             07/21/89

                             *** MPX GUIDELINES ***

                       PRODUCT: MPX CPU
                     FREQUENCY: MONTHLY

     ITEM                               RECOMMENDED ACTION
 |----------------|             |----------------------------------------|   

        BASE:                   clean and vacuum base and filters
                                check fans for obstruction s noise and binds.
                                keep covers reasonably clean

       CABLES:                  check for fraying, broken connectors,
                                tightness of fit.

       VOLTAGES:                check and adjust if necessary according to
                                FIB
                                Check protected supply and battery for proper
                                adjustment and charging ,replace if necessary.


       OPERATION:               check Errorlog utility,System Logs for
                                repeat problems


ORIGINATOR: J WHALEN


PREVENTIVE MAINT.-MAI BASIC FOUR-CPU----------------FIB001 Pg001


FIB 00002                                                             07/21/89

                             *** SPX GUIDELINES ***

                        PRODUCT: SPX
                      FREQUENCY: EVERY TWO MONTHS

        ITEM                            RECOMMMENDED ACTION
|-------------------|           |---------------------------------------|    

        BASE:                   Inspect and clean as required


        CABLES:                  Check for fraying,broken cables
                                 tightness of fit.


      OPERATION:                Check Errorlog and System logs for
                                repeat problems.

                                Run CPU diagnostics


ORIGINATOR: J WHALEN


PREVENTIVE MAINT.-MAI BASIC FOUR-CPU----------------FIB002 Pg001


FIB 00003                                                             07/24/89

                            *** 13XX  GUIDELINES ***

                       FREQUENCY: EVERY SIX MONTHS


        ITEM                            RECOMMENDED ACTION
 |------------------|           |---------------------------------------|

        BASE:                    CLEAN BASE AND COARSE FILTERS
                                 CHECK BATTERIES FOR CORROSION.              


        VOLTAGES:                CHECK AND ADJUST VOLTAGES AS REQUIRED.

        OPERATION:               CHECK SYSTEM LOGS FOR REPEAT PROBLEMS
                                 RUN CPU TESTS.


ORIGINATOR: J WHALEN


PREVENTIVE MAINT.-MAI BASIC FOUR-CPU----------------FIB003 Pg001